As an additional cost to cast Devouring Rage, you may sacrifice any number of Spirits.Target creature gets +3/+0 until end of turn. For each Spirit sacrificed this way, that creature gets an additional +3/+0 until end of turn.

When Dripping-Tongue Zubera is put into a graveyard from the battlefield, put a 1/1 colorless Spirit creature token onto the battlefield for each Zubera put into a graveyard from the battlefield this turn.